首页|Enhancing efficiency and stability of organic solar cells through a simplified four-step synthesis of fully non-fused ring electron acceptor

Enhancing efficiency and stability of organic solar cells through a simplified four-step synthesis of fully non-fused ring electron acceptor

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Design and synthesis of superior cost-effective non-fullerene acceptors(NFAs)are still big challenges for facilitating the commercialization of organic solar cells(OSCs),yet to be realized.Herein,two medium bandgap fully non-fused ring electron acceptors(NFREAs,medium bandgap,i.e.,1.3-1.8 eV),namely PTR-2C1 and PTR-4C1 are synthesized with only four steps by using intramolecular noncovalent interac-tion central core,structured alkyl side chain orientation linking units and flanking with different electron-withdrawing end group.Among them,PTR-4C1 exhibits increased average electrostatic potential(ESP)difference with polymer donor,enhanced crystallinity and compact π-π stacking compared with the control molecule PTR-2Cl.As a result,the PTR-4CI-based OSC achieved an impressive power conver-sion efficiency(PCE)of 14.72％,with a much higher open-circuit voltage(Voc)of 0.953 V and significantly improved fill factor(FF)of 0.758,demonstrating one of the best acceptor material in the top-performing fully NFREA-based OSCs with both high PCE and Voc.Notably,PTR-4Cl-based cells maintain a good T80 lifetime of its initial PCE after over 936 h under a continuous thermal annealing treatment and over 1300 h T80 lifetime without encapsulation.This work provides a cost-effective design strategy for NFREAs on obtaining high Voc,efficient exciton dissociation,and ordered molecular packing and thus high-efficiency and stable OSCs.

Organic solar cellsFully non-fused ring acceptorsEnd group engineeringMorphology regulationHigh efficiency

Chenyang Han、Huanhuan Gao、Yanna Sun、Yuanyuan Kan、Zhaozhao Bi、Wei Ma、Yani Zhang、Juan Antonio Zapien、Yingguo Yang、Ke Gao

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College of New Energy,Xi'an Shiyou University,Xi'an 710065,Shaanxi,China

Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion,Institute of Frontier Chemistry,School of Chemistry and Chemical Engineering,Shandong University,Qingdao 266237,Shandong,China

Department of Materials Science and Engineering,City University of Hong Kong,Kowloon,Hong Kong 99907,China

State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,Shaanxi,China

School of Microelectronics,Fudan University,Shanghai 200433,China

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Hong Kong Scholar programYoung Talent Fund of Xi'an Association for Science and TechnologyNatural Science Foundation Research Project of Shaanxi ProvincePostgraduate Innovation and Practical Ability Training Program of Xi'an Shiyou UniversityNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShandong Provincial Natural Science FoundationShandong Provincial Natural Science FoundationShandong Provincial Natural Science FoundationGuangdong Natural Science Foundation of ChinaGuangdong Natural Science Foundation of ChinaNational Key Research and Development Program of China funded by MOSTFundamental Research Funds of Shandong University

XJ2021-0389592023130802022JM-269YCS21212144521032215217204812175298ZR2021QB179ZR2021QB024ZR2021ZD062023A15150123232023A15150109432022YFB4200400

2024

10.1016/j.jechem.2024.02.026

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.93(6)
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